High Strength Drill Pipe

Continuous high drilling loads lead to increased fatigue rates. Proprietary grade S-135T™ offered by Grant Prideco provides high strength and high toughness. S-135T drill pipe incorporates a proprietary chemistry and a rigidly controlled quench and temper heat treatment. Providing a minimum average Charpy impact of 59 ft-lbs, S-135T meets or exceeds all of the requirements if of API S-135 as well as NS-1, DS-1 specification for critical service, NORSOK, and other rigourous proprietary standards. With significantly higher fracture toughness than API S-135 drill pipe, S-135T will work harder and longer.

UltraDeep™ UD-165™ is the result of an extensive two-year development program. During the design phase, four different chemistries were evaluated. Process parameters and mechanical properties — hardness, tensile, impact were optimized. With the alloy finalized, crack tip opening displacement (CTOD) testing, fatigue testing, slip-testing, full-scale manufacturing test and extensive field trails were conducted to verify performance.